Vincent sendee



Aug- 29, 1933- v. BENDlx AL' u r 1,924,592

BRAKE Filed Dec. 15, 1927 ATTORNEY Patented Aug. 2.9,` 1933l 1,924.59: BRAKE vincentl Bendix, chicago, m., ma Adm Y. Dodge, South Bend, Ind., assignors to Bendix Brake Company, South Bend,

tion of Illinois smal No. 249,243 .-i'cmms. v(ci. 18s-7s) any desired sort, determine the positions of the shoes when lthe ,brake is released.

The anchoring means in this case includes two Application December 15, 192'l This invention relates to brakes, -and is illustrated as embodied in an internal expanding brake for an automobile. An object of the invention is to provide a simple and inexpensive brake which is yet` extremely Ipowerilul vin its;

action.

One feature of the invention relates to arranging a servo shoe to overlap the ends of the friction means of the brake, vpreferably by providing the servo shoe'with spaced stiffening webs strad-V 1 dling those ends.

In one desirable arrangement, the servo-shoe is in direct thrust engagement with the ends of the friction means, for example having its two webs engaging thrust pins extending crosswise of said ends. We prefer thatthe friction means should be cf the type'anchoring on one of said ends when the drum is turning in one direction .and on theother'of said ends when the drum is turning in the other direction. Y

Other features of novelty relate to the shoe construction, and 'to other novel and desirable structural features which will be apparent from the following description of the illustrative embodiment shown in the accompanying drawing, in which: l

Figure l is a vertical section through the brake,

just inside the head of the brake drum, and show? ing the novel brake shoes inside elevation;

Figure 2 is a partial' section through one of the anchorages, on the line '2 2 of Figure 1;

Figure 3 is a partial radial section through the applying means on the line 3--3 of Figure l;

` Figure 4 is a partial horizontal section through the applying means, on the line 4-'4 of Figure 3; and

Figure 5 is a section through one of the brake shoes, on the line 5-5 of Figure l. Y

The illustrated brake includes a rotatable drum l0, at the open side oi.' which is a stationary support such as a bachng plate 12, and within which is arranged thefriction means of the brake.

We prefer that the friction means should comprise a device which is shiftable to anchor at one end when the drum is turning in one direction and at the other end 'when the drum isa-turning in the other direction, and shown as including two brake shoes 14 and 16 connected by a floating expansible joint 18, against which the shoes areheldbyatensionsprlng 20.l

AsshowninFigure5,eachshoemaybebuilt upbyweldingtogetherarim22.towhichthe `lining24m-afterwards'secured,andaseparatelyformed stiffening web 28. Suitable stops 28, of

posts or abutments 30 and 32 carried by thev Ind., a corporabacking'plata the end of shoe 16 anchoring on post 30 when the drum is turning clockwise and the end of shoe 14 anchoring on post 32 when the drum is turning counter-clockwise.

The ends of the shoes are preferably reinforced by plates 34 spot-Weldedl or otherwise secured to their sides, and which may be flanged laterally atl their ends to extend the surfaces bearing against posts 30 and 32. We prefer to' press novel thrust pins 36 crosswise of the shoes through the triple-thickness reinforced end portions.

These pins are so arranged as to seat in sock- `ets lcut in the ends of spaced stiiening -webs 38 of an improved servo-shoe40, the webs having relatively large openings 42 for the anchors 30, and if desired'being in the form of steel stampings welded to the rim of the shoe.-

Between the webs 38, Athere is secured to the inner face of the rim of shoe a wear plate 44, for engagement with an applying device such as a cam 46 on a camshaft 48 journaled in a support 50'carried by the backing plate l2. -Shaft 48 passesthrough .a relatively large opening 52 in one webof shoe 40, so that it does noty interfere with lengthwise movement of the shoe.

IWhen shoe40 is forced against the drum, against the 'resistance-of'return springs 54 connecting it to the shoes 14 and 16, it. turns in the same direction as'the drum, in engagement with one of the pins 36, to apply the friction device comprising the shoes-14 and 16. It will be noticed that the webs of shoe '40 straddle the ends of the friction device l4-16, in such a manner that the servo shoe 'overlaps the friction device, thus giv-` ing as much lining with the drum.

as possible in engagementy While one illustrative embodiment has been described in detail, it is not our intention to limit its scope to that particular embodiment, or otherwise than by the terms We claim:

of the appended claims.

l. A brake comprising, in combination, a shoe having spaced webs, at least one of which is formedv with a vrelatively-large opening, and a vided with an shaft passing through said opening and proapplying device between said webs in engagem'ent with the shoe.

2. A brake comprising a shoe having spaced webs notched at their ends and one of which is formed with an applying device.

opening for the insertion of an :3. A'brske `comprising a shoe having webs notched st their ends and one of which is spaced formed' with an opening for the insertion o! .an spplyingdevice and formed with anchor-clear- 5 ance openings on opposite sides of the applyingdevice opening.`

4, Avbrake comprising a. shoe spaced VINCENT BENDDI. ADIEL Y. Douces.- 

